SI88643ED-IS

Overview

The SI88643ED-IS is a Skyworks Solutions digital isolator featuring four unidirectional channels and an integrated DC-DC converter. It provides 5000 Vrms isolation voltage using capacitive coupling technology. The device supports data rates up to 100 Mb/s with a propagation delay of 18 ns. Operating on a supply voltage range of 3 V to 5.5 V, it delivers low power consumption at 9.5 mA. The component is housed in a 24-SOIC package and meets AEC-Q100 automotive qualification standards for reliability.

Feature Summary

• Integrates a high-efficiency isolated DC-DC converter to provide power across the isolation barrier
• Utilizes silicon dioxide (SiO2) capacitive coupling for robust signal transmission
• Features high common-mode transient immunity to ensure signal integrity in noisy environments

Applications

• Automotive electric vehicle charging systems
• Industrial motor control drives
• Inverter gate driver circuits

Procurement Notes

Verify the specific suffix 'ED' confirms the SOIC-Wide-24 package variant. Confirm AEC-Q100 qualification status if automotive deployment is required. Check moisture sensitivity level (MSL 3) requirements for surface-mount reflow soldering processes. Ensure the integrated DC-DC converter output matches the target secondary side voltage needs.

Selection Notes

Select this model when bidirectional isolation is not required due to its unidirectional channel configuration. The integrated DC-DC converter eliminates the need for external isolated power supplies, simplifying board layout. Compare against the SI88643EC-IS if lower insulation voltage specifications are acceptable for the application environment.

Part Context

This component belongs to the Si8864x family of digital isolators from Skyworks Solutions. It is designed for applications requiring high reliability and safety compliance. The series integrates isolation technology with power conversion capabilities to reduce system complexity and component count in high-voltage designs.

Replacement Considerations

Public confirmed substitute part numbers include SI88643BC-IS.